Neptunium(VI) fluoride

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Neptunium(VI) fluoride^[1]

Names
IUPAC name Neptunium(VI) fluoride
Other names Neptunium hexafluoride
Identifiers
CAS Number	14521-05-2 Y
3D model (JSmol)	Interactive image
PubChem CID	19695135
InChI InChI=1S/6FH.Np/h6*1H;/q;;;;;;+6/p-6 N
SMILES F[Np](F)(F)(F)(F)F
Properties
Chemical formula	F6Np
Molar mass	351 g·mol−1
Appearance	orange crystals
Melting point	54.4 °C (129.9 °F; 327.5 K)
Boiling point	55.18 °C (131.32 °F; 328.33 K)
Structure
Crystal structure	Orthorhombic, oP28
Space group	Pnma, No. 62
Coordination geometry	octahedral (Oh)
Dipole moment	0 D
Thermochemistry[2]: 736
Std molar entropy (S⦵298)	229.1 ± 0.5 J·K−1·mol−1
Related compounds
Related fluoroNeptuniums	Neptunium trifluoride Neptunium tetrafluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N (what is YN ?) Infobox references

Neptunium(VI) fluoride (NpF₆) is the highest fluoride of neptunium, it is also one of seventeen known binary hexafluorides. It is a volatile orange crystalline solid.^[1] It is relatively hard to handle, being very corrosive, volatile and radioactive. Neptunium hexafluoride is stable in dry air but reacts vigorously with water.

At normal pressure, it melts at 54.4 °C and boils at 55.18 °C. It is the only neptunium compound that boils at a low temperature. Due to these properties, it is possible to easily separate neptunium from spent fuel.